Nut-locking device



K. MACKENZIE NUT LOCKING DEVICE Aug, 2,1927. 1,637,620

Filed NOV. 24, 1926 PatentedAug. 2, y1927. y

1,637,620 PAT-ENT GFI-sica I xnNNETH MAcxENzmcr TAUNTON', uassacnnsm'rs n A yMyinvention relates todevices adapted to `maintain the nut from accidental disengagement fromits bolt and yis adaptedprimarily .foruse upon rails in conjunction with fish plates. f e c The essential objects of my invention :are

i to prevent loosening ol the nut vfrom its bolt; rto rinsure aconstant ,and eXtrem-e pressure of the Washeror locking plateagainstthe fishplate, y'and the bolt head against the rail, when the bolt is, employed yin conjunction with rails; lto prevent accidental circular tions of parts as fall Within the scope of the i movement of the'locking plate orr Washer; to shield ythe bolt thread from mutilation or other injury; strength of construction; com` pactness; and to attain 'all these ends by means of aunit formed from a single piece of material with a minimum of labor and expense.

To the above ends essentially my 'invention consists vin such parts and in such combinalappended claims.

In the. accompanying drawings which form a party of this specification,

Figure lis a transverse section of a rail i and fish'plates tightly engaged bymy novel device, t j Figure 2, an enlarged side elevation of a bolt nut, andflocking plate, loosely assembled and detached from a rail, and

Figures 3 and 4, a front and rear elevation' respectivelyof' the locking plate or Washer.

Like characters of reference indicate like parts throughout the views. y

My locking device is herein shown applied to a rail 5 and lish plates, comprising ,bodies 7 and flanges or shoes 8. The rail and plates are provided respectivelywithopen ings 9 and lllfor the reception of a bolt l2 of any usual preferred construct-ion. The bolt comprises a head 13, neck lll, and shank thread shields 24. The latter are disposedy alternately With, or in staggered relation to y teeth '30.

yapplicanofme@ novemter 24,1926.y seran No. 150,447.`

inclined resilient lips 2,6 adapted to engage the innery face of the nut 18. Ea'chvlipis defined lby the hole 23, a serrated .slot 27 extendiugradially frein the latter, and an arcuate slit 28 communicating with the slotl 27 and conforming with the curvature of the l`hol.e.yThe':tree endsfof the tongues 26 are outwardly bent and project forwardly from the front ofthe plate 20, rather than rear- ,Wardly 'from the back of the latter as do the shields 24, and vhave terminal serrationsy or In operation the bolt 12 extendsasusual through ythe openings 9 and l0 of the rail' and fish plates.

t The platel 20 is placed against the face of. one of the fish plates,

j the shields 24 registering in the opening l0 of the latter, and protecting the bolt thread 16 from mutilation or accidental contact with the Wall of the surrounding opening 10. In thus applying the plate 20 one of its edges 2l engage or is adjacent the shoe 8 of the fish plate which prevents rotation of the plate 20, because `the maximum radius of the plate 2O exceeds the distance 'between the opening l0 and shoe 8. The shields 24 are concentric with the'opening 23 ofthe' plate r2O thus as they are inserted in the opening 10 serve also to properlylocate the edges'of the plate 20 relatively to ,the shoe. Next the nut 19 is applied to the i bolt, and'before tightening assumes a position relatively to the lips 26 as that' shown in Figure 2; Vhe'n, however, the nut is finally set up the projecting ends of the lips will be forcedback into approximately the plane of the plate 20.

It is important to note that by reason of the location of the lips 26. at the central p0rtionof the plate 20 rather than at a substantial Vdistance from the latter, they are Wholly covered by the nut, and the latter is tightly locked by reason of the compression Y of the springlips, rather than, as heretofore,

by lips' engaging the lateral faces of the nuts and serving merely as stops. The `teeth 30 increase the grip of the springlips upon f the nut.

It is also important to note that not .only are the shields 24 disposed at right angles with relation to the plate 20, rather than at an yinclination thereto, but that the shields are oppositcly directed from the lips 26. This adds to ,the compactness and efficiency kof the plate 20.

Strength of construction as well as econy omy is afforded by the alternate arrangement of lips and shields.V

Iclaimz- Y x l. In a nut lock;the-"combination Withsa bolt and a nut, of a locking plate kprovided with a hole to receive the bolt., anfannular series of inclined resilient tongues integral with the plate abutting' against the nut and' ,whollyenclosed-by the nut, and interspaced shields 'integral with the plate at thel edge `of the hole projecting l inV a direction away from thenut.

, 2; Inanut lock, the combination with a V"bolt and a nut, of a locking 4plate'provided .With a holel to receive the bolt, an annular series of inclined resilient tongues Vintegral lwith theplate and provided with terminal ,serrations abutting againstv the nut and [Wholly enclosed by the nut, and interspaced shields integral with the plate aty the edge #ofthehole .at right angles to the plate ,pro-

l-jecting in a direction awayfrom the nut.

3; In a nut lock, the combinationw-Witha .boltQand nut, voi" alocking plate provided signature.

With ahole yadapted to receive the bolt, al series of compressible tongues upon the plate 'bounding the hole and directed towards the Vintermediate the nut and the body of the sh plate and' engaging the shoe of the fish plate and provided With a hole to receive the bolt, resilient tongues uponthe'locking plate bounding the hole engaging the nut,

and shields integralwith the locking Vplate around the hole extending in the opening in the ish plate. i y

Intestirnony whereof I have axed kmy YKninnirn iviAcKENZIE.v 

